Linus Torvalds ea6f043fc9 x86: Make __get_user() generate an out-of-line call ... Instead of inlining the whole stac/lfence/mov/clac sequence (which also requires individual exception table entries and several asm instruction alternatives entries), just generate "call __get_user_nocheck_X" for the __get_user() cases. We can use all the same infrastructure that we already do for the regular "get_user()", and the end result is simpler source code, and much simpler code generation. It also means that when I introduce asm goto with input for "unsafe_get_user()", there are no nasty interactions with the __get_user() code. Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2020-10-12 16:57:57 -07:00
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asm	x86: Make __get_user() generate an out-of-line call	2020-10-12 16:57:57 -07:00
uapi/asm	Support for FSGSBASE. Almost 5 years after the first RFC to support it,	2020-08-04 21:16:22 -07:00